hi,until now i've been using the effects echo from my mixer but want to buy separate unit to connect to my siren box! any suggestions for ideal echo unit and best way to wire it up!many thanks for any ideas!

Maybe (?) you can use the 'Booth' (if not using) as the 'aux send' to your echo (connect to input).. then connect the output of your echo to the line in of the 3rd channel... Twisting the booth knob sends the mix to the echo - you would need to take care with that so you dont clip the signal going to the echo... (Kill/Lower the bass perhaps on the 3rd channel) You can also connect your siren directly to the RE-20 if you dont use both the inputs for the booth.. hopefully you don't blow up your house!

Think the Booth output pass out the same signal as the master output - in this case you'll have the echoed output fed back into the echo unit creating a feedback loop King Tubby style - house WILL blow !

Only way i can see using a send/return setting with this mixer is using the headphones output as aux send fed back into the 3rd channel, just be careful not to enable headphone monitoring for the return channel & create a feedback loop - your house *might* be safe this way. You wouldn't be able to use the headphones out this way though...

Thanx again, yeah the 'booth' isn't in use the way I have it set up, so that maybe an option as you say. I'll try give it go, maybe borrow a friends first before investing. Thanx for the advice. I'll try not to blow the house down...